Brake having pressed-metal shoes



Jan. 31, 1928;

A. Y. DODGE BRAKE HAVING PRESSED METAL SHOES Filed o t. 24, 1925 INVENTOR ADIEL Y. DODGE ATTORNEY Patented Jan. 31, 1928.

UNITED STATES entrant orator...

ADIEL Y. DODGE, OF SOUTH BEND, INDIANA, ASSIGNOB TO BENDIX BRAKE GOMFANY, OF CHICAGO, ILLINOIS, A. GDRPOBATION OF ILLINOIS.

BRAKE HAVING. PRESSED-METAL $HOES.

Application filed October 24, 1925.

This invention relates. to brakes, and is illustrated as embodied in an automobile brake. An object of the invention is to provide a novel shoe arrangement pernntting 15 the manufacture of the shoes by pressing or stamping them out. An important feature of the invention relates to pressing or forming the parts to provide members extended at one end of the shoe to be anchored, or to be connected to another shoe, in such a manner as to overlap the adjacent shoes. Preferably the inner ends of these arms are reinforced by a plate or the like bridging the arms, and illustrated as forming a continuation of the lining-supporting surface.

The above and other objects and features of the invention, including various novel combinations of parts and desirable particular-constructions, will be apparent from the following description of one illustrat ve embodiment shown in the accompanying drawings, in which:

Fig. 1 is a vertical section through the brake, just inside the wheel, showing the shoes in-side elevation;

Fig. 2 is a side elevation of one of the shoes, without the brake linings, detached from the brake;

Fig. 3 is an elevation of the same shoe, looking outwardly from the center of the brake;

Fig. 4 is an elevation of the shoe, turned around 180 degrees from its position 111 Fig. 3; I

Fig. 5 is a vertical -section on the line 5-5 of Fig. 1, showing the construction of the shoes,

Fig. 6 is a partial section on the 11116 66 of Fig. 1, showing the anchorages for the shoes;

Fig. 7 is a partial radial section on the line 77 of Fig. 1, showing the pivot connection between two of the shoes; and

Fig. 8 is a partial section on the line 8-8 of Fig. 1, showing an anti-rattle spring.

In the arrangement selected for illustra tion, the brake comprises a drum 10, which is rotatably mounted to turn with the road wheel or with the. propeller shaft, in the case of a vehicle. NVithin the drum is arranged novel friction means shown as a. reverse shoe 12, a forward shoe 14, and a ser e or unanchored shoe 16 connected to the forward shoe or otherwise arranged to Serial No. 64,538.

operate by its angular movement one or 5% both of the other shoes. The reverseshoe 12 and the servo shoe 16 are preferably identical and interchangeable. The brake is applied by driver-controlled means such as a double cam 18, Wlllth may operate shoe no 12 directly, and which is shown as forcing shoe 16 against the drum in such a manner that it is urged angulariy by the friction of the drum to apply shoe 14. A. main spring 20 urges shoes 12 and 16 away from the drum, and an auxiliary spring 22 holds shoe 14 away from the drum until overcome by the movement of shoe 16. The'brake lining is shown at 24.

Each shoe preferably comprises a pair of m comparatively shallow channel members 01 the like riveted or otherwise secured back to back, as appears in Fig. 5. The inner flanges 26 which extend outwardly parallel to the axis of the drum, and which are not absolutely essential, are relatively short, and are for the purpose. of stiifening and reinforcing the shoe. The outer flanges 28 are longer, and together form a circumferential part supporting the brake lining 24, riveted w or otherwise. secured thereto. At the adjacent ends of shoes 12 and 16, the radial central parts of the channels are turned outwardly toform transverse radial flanges 30,

cro swise of the shoes, to which are riveted or otherwise secured the wear plates 32 for cam 18. i The radial central parts of the channels together form a central radial part orweb 34. At the ends of shoes 12 and 16 the parts so of web 34 are offset from the center of the shoe, for example by being spread apart and. continued as arms 36 and 38 overlapp1ng or straddling the web 34 of shoe 14. Shoe 12 is anchored by a pivot 40 passing through a relatively large opening 41 in web 34 of shoe 14, and shoe 14 is anchored by a pivot pin 42 passing through relatively large openings 44in the arms 36 and 38 of shoe 12, thus in effect overlapping the shoes and giving a much larger area of brake lining in engagement with the drum. Preferably the backing plate 46 of the brake is reinv forced at the anchors by a heavier plate 48.

Arms 36 and- 38 of shoe. 16 are pivot-ally 106 connected\ to the web 34 of shoe 14 by a ivot in 50, which may have a head slidably held against the backing plate 46, to

steady the shoes, partly by spring 22, and partly by a spring 52 secured to a pin 5-];

ridging the outer opening 44 and seated in stampe depressions 56 (Fig. 2). The metal of arms 36 and 38 may be drawn out as tubular projections 58 forming in effect integral bushings sleeved on the pivot pin 50 or on the anchor 40.

Preferably the arms 36 and 38 of each shoe are reinforced, and the area of the brake lining increased, by a reinforcing plate 60, shown as set down into the arms to form in effect a continuation of flanges 28. Plates 60 may be riveted, or spot welded or otherwise secured, to short flanges on arms 36 and 38 extending outwardly parallel to the axis of the drum.

It should be noted that the outer surfaces of the shoes are so formed that the lining is coaxial with the drum when the brake is applied, instead of coaxial when the brake is off, in the usualmanncr, thus giving maximum efi'ective engagement with the drum. The free ends of shoes 12 and 16 are confined laterally by a plate 62 carried by posts 64 extending through slots in the webs 34 of the shoes, and slidably engaged by the edges of the cam plates 32.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise than by the terms of the appended claims. The subject-matter claimed herein is similar to my prior applications Nos. 754,711 and 24.426 (now Patent 1,567.716. dated December 2.), 1925), filed respectively December 8, 1924, and April 20, 1925.

I claim:

1. A brake comprising a central shoe and two end shoes of pressed metal, the webs of the end Shoes at the ends next the central shoe being out of alinement with the ends of the web of the central shoe. to permit the elrlid shoes to overlap the ends of the central s 0e.

2. A brake comprising shoes of pressed metal. the web of one shoe at the end next the other being out of alincment with the end of the Web of said other shoe, to permit the shoes to overlap at their ends, in combination with brake-applying means including a third shoe acting on at least one of the overlapping shoes.

3. A brake comprising, in combination. a first anchored shoe having a radial central web at its anchored end, a co-operating anchored shoe of pressed metal parts arranged to form a circumferential lining-supporting surface and radial reinforcing parts extended in the form of a pair of spaced anchoring arms arranged on opposite sides of the central web of the first shoe. an anchor at the ends of said arms, and means for applying the brake.

4. A brake as defined by claim 3, in which said anchor for the co-operating shoe passes through an opening in the central web of the first shoe.

5. A brake comprising, in combination, a shoe pivoted at one end, a pressed metal shoe having spaced arms straddling the pivoted end of the first shoe, means for anchoring said arms including a pivot passing through said straddled end, and means for applying the brake.

6. A brake comprising, in combination, a shoe pivoted at one end, a pressed metal shoe having spaced arms straddling the free end of the first shoe, a connection between the first shoe and said straddling arms, and means for applying the brake.

7. A brake comprising, in combination, a shoe pivoted at one end, a pressed shoe formed with a pair of radial flanges secured together to form a single stiffening web and spread apart at the end of the shoe and extended to form spaced arms straddling the pivoted end of the first shoe, means for anchoring said arms, and means for applying the brake.

8. A brake comprising, in combination, a shoe pivoted at one end, a pressed shoe formed with a pair of radial flanges extended to form spaced arms straddling the free end of said first shoe, a connection between the first shoe and said straddling arms. and means for applying the brake.

9. A brake conuirising shoes of pressed metal with stiffening flanges secured to each other between the edges of the shoes. the flanges of one shoe being in the central plane of the shoe at its end and the flanges of the other shoe being offset from said central plane and overlapping the ends of the flanges of said first shoe.

10. A brake comprising shoes of pressed metal with stiffening flanges between the edges of the shoes, the flanges of one shoe being spread apart and straddling the ends fit] Hit)

of the flanges of the other shoe and pivotally connected thereto.

11. A brake comprising three pressedmetal shoes, viz: a central shoe having a centrally-arranged stiffening flange, and two end shoes having laterally offset, stiffening flanges overlapping opposite ends of said centrally-arranged flange.

12. A brake comprising three pressedmetal shoes. viz: a central shoe having a centrally-arranged stifiening flange, and two end shoes having laterally ofi'set'stifiening. flanges overlapping opposite ends of said centrally-arranged flange, each of the three shoes being built up of separate pressed parts so constructed that the stiffening flanges of the shoes are integral with part8 of the cylindrical portions of the shoes.

13. A brake including overlapping shoes. each of which is formed of two pressed metal straddle the end of the other shoe.

14. A brake including overlapping shoes, each of which is formed of two pressed metal parts joined together in the central plane of the shoe, with the parts of the first shoe spaced apart at the end of the shoe to straddle the end of the other shoe, together with a plate bridging said spaced parts and crossing the, end of said other shoe and forming part of the friction face of the first shoe.

15. A brake including shoes, the first of which has spaced arms straddling the end of the other, together with a separate plate bridging said arms across the end of said other shoe and forming a part of the friction face of the first shoe.

16. An expansible brake shoe for automobiles, embracing two upper segmental sections and an intermediate lower segmental section arranged in circular order, each such section comprising two reversely formed drawn sheet metal parts, each part having a curved web and an arcuate lateral flange at the outer edge thereof, the said parts in complemental pairs being united with their webs back to back and their arcuate flanges in axial alignment to form widened supports for a brake lining, the upper sections being separated at their lower ends to receive between them the ends of the intermediate lower section, a floating pivot carried by the lower section and mounted near one end thereof forsupporting one of the upper sections, a fixed pivot arranged near the other end of the lower section for supporting the other upper section, and a fixed pivot at one end of the lower section for supporting the latter.

17. An expansible brake shoe for automobiles, comprising three segmental sections arranged in circular order, each section being composed of two reversely formed drawn sheet metal parts, each such part having a curved. vertically standing web and an arcuate lateral flange at the outer edge thereof, the said parts in complemental pairs bein assembled with their webs back to back an united to form a unitary structure with the arcuate flanges extending in axial alignment to present a widened support for a brake lining, and with the webs at the remote ends of two of the sections separated for the reception of the opposite ends of the third section.

18. An expansible brake shoe for automobiles, comprising three segmental sections arranged in circular order, each section being composed 'of two reversely formed drawn sheet metal parts, each such part having a curved vertically standing web and an arcuate lateral flange at the outer edge thereof, the said parts in complemental pairs being assembled with their webs back to back and united to form a unitary structure with the arcuate flanges extending in axial alignment to present a widened sup- -port for a brake lining, with the webs at the remote ends of two of the sections separated for the reception of the opposite ends of the third section, and curved bridge pieces covering the space between the separated webs to extend the brake lining support.

In testimony whereof, I have hereunto signed my name.

Y A DIEL Y. DODGE. 

